positioned to scare off birds that might try to land in this still very oily wetland. >> the last time i was up here was about a month ago. back then, about 600 workers. we were there inn there, real shallow areas trying to vacuum up pockets of oil along this entire stretch. real time consuming. >> reporter: bp's george carter knows cleaning the marsh is not easy. >> we've actually cut the grass. we've raked the grass. we've flushed it in a couple of occasions. trd chemicals to try to remove the stuff. >> reporter: these areas we're experimenting to hope to yield healthy grass. >> new patches are already starting to come in. >> there's some grass trying to grow. >> reporter: as tempting as it is to go in and do something aggressive, the worst thing can you do is tread heavily on this marsh grass. this is a test of patience. >> talk about patience, we ale want it. the people that live here may be